Artículo
Characterization and analysis of the carbonation process of a lime mortar obtained from posphogypsum waste
Autor/es | Romero Hermida, Isabel
Borrero-López, Antonio María Flores Alés, Vicente Alejandre Sánchez, Francisco Javier Franco Gómez, José María Santos Sánchez, Alberto Esquivias Fedriani, Luis María |
Departamento | Universidad de Sevilla. Departamento de Construcciones Arquitectónicas II (ETSIE) |
Fecha de publicación | 2021 |
Fecha de depósito | 2021-09-21 |
Publicado en |
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Resumen | This work addresses the reuse of waste products as a raw material for lime putties, which are one of the components of mortar. 1:3 Lime/sand mortars very similar to conventional construction mortars were prepared using a ... This work addresses the reuse of waste products as a raw material for lime putties, which are one of the components of mortar. 1:3 Lime/sand mortars very similar to conventional construction mortars were prepared using a lime putty obtained from the treatment of phosphogypsum with sodium hydroxide. The physical, rheological and mechanical properties of this phosphogypsum-derived mortar have been studied, as well as the mineralogical composition, microstructure by scanning electron microscope (SEM) and curing process by monitoring carbonation and ultrasonic propagation velocity. Considering the negative influence of sulphates on the hardened material, the behaviour of the material after sulphates precipitation by adding barium sulphate was additionally tested. Carbonation progressed from the outside to the inside of the specimen through the porous system by Liesegang rings patterns for mortars with soluble sulphates, while the carbonation with precipitated sulphates was controlled by diffusion-precipitation. Overall, the negative influence of low-sulphate contents on the mechanical properties of mortars was verified. It must be highlighted the importance of their precipitation to obtain adequate performance. |
Cita | Romero Hermida, I., Borrero-López, A.M., Flores Alés, V., Alejandre Sánchez, F.J., Franco Gómez, J.M., Santos Sánchez, A. y Esquivias Fedriani, L.M. (2021). Characterization and analysis of the carbonation process of a lime mortar obtained from posphogypsum waste. Environmental Research and Public Health, 18 (12), 1-20. |
Ficheros | Tamaño | Formato | Ver | Descripción |
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ijerph-18-06664-v2.pdf | 6.306Mb | [PDF] | Ver/ | |